某市供水系统饮用水中有机物的毒性及其影响因素  

Toxicity and Influencing Factors of Organic Substances in Drinking Water of a City's Supply Systems

作　　者：刘俊玲[1] 韩雪 王艳 王怀记[1,2] LIU Junling;HAN Xue;WANG Yan;WANG Huaiji(Wuhan Centers for Disease Prevention&Control,Wuhan 430022,China;School of Public Health,Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430030,China)

机构地区：[1]武汉市疾病预防控制中心,湖北武汉430022 [2]华中科技大学同济医学院公共卫生学院,湖北武汉430030

出　　处：《中国环境监测》2024年第4期166-171,共6页Environmental Monitoring in China

摘　　要：为了解某市饮用水中有机物的生物毒性及其影响因素,在2018年6月至2019年9月期间采集该市A、B两个水厂的水源水、出厂水和管网水,测定水样有机提取物对费式弧菌(Vibrio fischeri)发光的抑制作用,计算引起50%发光抑制的浓度(EC_(50)),并分析其与水样在254 nm波长处的紫外吸光度值(UV_(254))、溶解性有机碳(DOC)浓度的关联。结果表明:饮用水有机提取物EC_(50)值范围为0.23~98.97 REF(相对富集系数),中位数为3.37 REF。水文期、常规饮用水处理工艺、管网输送过程及水源水UV_(254)和DOC浓度水平对饮用水中有机物的毒性无明显影响。饮用水UV_(254)、DOC浓度与有机提取物EC_(50)的Spearman相关系数分别为-0.025(P=0.807)、-0.237(P=0.020),表明不能用UV_(254)、DOC浓度检测代替毒性测试来监测饮用水有机物污染的潜在健康风险。To understand the biological toxicity and influencing factors of organic substances in drinking water in a certain city,the source water,finished water and tap water of two water plants in the city were collected from June 2018 to September 2019 to determine the inhibitory effect of samples organic extracts on luminescence of Vibrio fischeri,and correlations between effective concentration causing 50%luminescence inhibition(EC_(50))with the conventional water quality parameters[ultraviolet absorbance at 254 nm(UV_(254))and dissolved organic carbon(DOC)]were investigated.The results showed that EC_(50)values for organic extracts of drinking water samples ranged from 0.23 to 98.97 REF(relative enrichment factor),with a median value of 3.37 REF.The hydrological period,conventional water treatment process,drinking water distribution process,and UV_(254)and DOC levels of the source water had no obvious impact on drinking water toxicity.For drinking water samples,the Spearman correlation coefficients of UV_(254)and DOC levels with EC_(50)values were-0.025(P=0.807)and-0.237(P=0.020),respectively,indicating that UV_(254)and DOC measurements cannot replace toxicity testing for monitoring the potential health risk of drinking water organic contaminants.

关 键 词：饮用水 水质监测 有机提取物 费式弧菌 生物毒性 

分 类 号：X592[环境科学与工程—环境工程] R123[医药卫生—环境卫生学]